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■ What is D-STAR?
• D-STAR is a digital protocol standard developed by
the Japan Amateur Radio League (JARL). The system
includes the DV mode for Digital Voice and the DD mode
for Digital Data communications.
• D-STAR supports a comprehensive repeater system linked
through the Internet, enabling you to make QSOs with
stations near or far from your location.
Advanced Amateur radio technology of D-STAR
The DV mode has a bandwidth of only
6 kHz, compared to 16 kHz for the
analog FM mode, with 5 kHz deviation.
D-STAR utilizes the well-know GMSK
modulation method that makes very
efficient use of occupied bandwidth.
• D-STAR supports the DV mode at 4.8 kbps. Your call sign
data, and either a short message, or GPS data can be
transmitted simultaneously with your voice signal.
D-STAR (F7W)
fo
Frequency
6 kHz
6 kHz
10 kHz
10 kHz
10 kHz
10 kHz
10 kHz
10 kHz
20 kHz
20 kHz
20 kHz
20 kHz
D-STAR occupies 10 kHz. The sound quality is
good even though the bandwidth is narrow.
FM (F3E)
10 kHz
10 kHz
10 kHz
10 kHz
20 kHz
20 kHz
The regular FM mode occupies 20 kHz
that is a double the bandwidth of D-STAR.
INTRODUCTION
fo
Frequency
16 kHz
16 kHz
10 kHz
10 kHz
10 kHz
10 kHz
10 kHz
10 kHz
20 kHz
20 kHz
D-STAR GUIDE
36
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